Form clamp



H. H. LAMPERT Nov. 27, 1928.

FORM CLAMP Filed April 12, 1928 Patented Nov. 27, 1928.

UNITED STATES HENRY H. LAMBERT, or oHicAeqrLLnvoIs.

roam CLAMP.

Application filed April 12, 1928.

The main objects of this invention are to provide an improved clampparticularly adapted for use as a form clamp in connection with concreteconstruction work; to provide a form clamp havin an improved form ofguideway for receiving a tie element; to

provide an improved form of keyway for receiving a wedge to detachablysecure the tie element to the clamp; and to provide a form clamp of thiskind which may be readily stamped out of sheet metal.

Illustrative embodiments of this invention are shown in the accompanyingdrawing, wherein Figure 1 is a fragmentary section of a structural shapeto which a tie element is secured by an improved clamp.

Fig. 2 is a perspective of part of a wall mold to which a tie elementissecured by an other type of the improved clamp.

F 3 is a perspective of the clamp shown in Fig. 1 with part of a tieband extending therethrough and with the wedge removed.

Fig. t is a view. similar to Fig. 3 but Showing the tie band crimped bythe wedge.

5 is a section taken on the line 5-5 of Fig. 4. Y

Fig. 6 is a transverse section, taken on the line 66 of Fig. 5.-

, Clamps embodying this invention are adapted for use in connection withvarious types of molds. Fig. 1 shows one formof clamp applied to astructural .shape employed in the construction of girders and beams. henthe clamp is to be used in connection with floor moldsor wall molds, thetype shown in Fig. 2 may be used.

The improved clamp preferably comprises a sheet metal stamping formed toprovide a m guideway for a flexible tie element and a transverselydisposed keyway for receiving a wedge which is adapted to kink the tieelement.

In the construction shown in Figs. 1', 3, 4, 5

and 6, the improved clamp comprises a sheet metal plate 1 adapted torest on top of an I-beam 2 and having one end thereof curled to providea bearing 3 adapted to embrace one edge of the beam flange 4.

A portion of the plate 1 is struck out therefrom to provide a recess 5and an overlying bridge portion 6. The central portion of the bridge 6is further offset to provide a pocket or recess 7 and a pair ofshoulders 8.

The bridge 6 is open at both ends to permit the insertion of a tie band9 through the Serial No. 269,539.

guideway formed by the bridge. Located on opposite ends of the bridge 6,is a'pair of bearing portions 10 and 11 for supporting the band. Locatedon opposite sides of the recess 5,

adjacent the recess 7, is a pair of bearing 5 i parts 12 which areoffset to form a keyway for a wedge 13 which is adapted to kink the tieband by forcing it into the recess 7 "be tween the shoulders 8. In thespecific forms herein shown, the offset portions 6 and 12 are located onrespectively opposite sides of the plane of the plate 1.

The ends of the bridge portion 6 are bendable so that, under the actionof a hammer or similar tool, they may be forced' downwardly into therecess 5 to further kink the tie band in the event that is necessary.

The extremities of the bridge 6 are spaced from the shoulders 14 at theends of the recess 5 so as to allow ample room for the bending of thetie band at these points.

The clamp shown in Fig. 2 comprises a plate 15 having a guideway 16 forthe tie element 9 anda transverse keyway 17 for the wedge 13 which aresimilar in construction and arrangementto those shown in Figs. 3, l 5and 6 and therefore need no further description. I

One end of the plate 15 is bent at substantially right angles thereto toform a bearing flange 18.having a ertures for receiving nails 19 wherebythe c amp may be temporarily secured to a wall mold 20. I The tieelement 9 is adjusted with respect to the clamp by atool 21 comprising ashank which provides a handle andfa head 22 on which is pivotallymounted a V-shaped locking jaw 23, which straddles the head 22 and whichis pivotally secured thereto by a pin 24. The parts are arranged sothat, when the jaw 23 is swung to an angular position relative to thehandle, an opening is provided for receiving the tie element so as topermit the tool to grip the portion of the tie projecting beyond theclamp.

Vith the clamp shown in Fig. 1, the tool 21 is fulcrumed on the outerface of the bearing 3 and with the clamp shown in Fig. 2, it may befulcrumed on the bearing 18.

In operation, the tie band is inserted through the guideway with one endthereof projecting sufiiciently beyond the clam to be gripped by thetool 21. The tool 21 is then applied to draw the tie band taut. Afterthe band has been adjusted, the wedge 13 is driven into its keyway forkinking the band. If additional kinking of the band is necessary,

' the ends of the bridge portion may be bent recess forming a lreywaytor a'wedgeadapted to bend the tie element into said recess.

2. 'A clamp comprising a support, a portion of said support forming aguideivay for a tie element, said support having a recess adjacent saidguideway, and a pair of oflfsct bearing "portions on respectivelyopposite sides of said recess forming a keyway for a Wedge adapted tobend the tie element into said recess.

8. Aclainp comprising a sheet metal plate, a portion oi said'plateiiorining a guideivay for a tie element,vsaid plate having a recesstherein, portions onopposite sides of said recess being ollset frointheplane of said plate to form a lreyWa-y. 1

4. A clamp comprising a sheet metal plate, a portion of said plateforming a guideway for a tie element, said plate having a recesstherein, portions on opposite sides of said recess be ng ofisetfromtheplane of said plateto .forin a lreyway, and a wedge in said key vayadapted to kink the tie element by forcing it into said recess.

5. A clamp comprising a sheet metal plate, a portion of said plateforming a guideway for a tie element, said plate having a pair of.offset portions on respectively opposite sides of the planeof saidplate, one of said oliset portions providing a shoulder and the otherofsaid offset portions forming a key Way for a Wedge.

' 6. A clamp comprising a sheet metal plate, a port-ion 01" said platetorminga guideivay 'for tie element, a pair 01" ollset portions onrespectively opposite sides of the plane of said plate, oneo-i saidofiset portions providing a shoulder and the other of said offsetportions forming a keyway, and a Wedge located in said keyivay andadapted to kink thetie element by bending it into engagement with saidshoulder;

7. A clamp comprising a sheet metal plate, a portion of said plateforming a guideway for a tie element, a pair of offset portions onrespectii' ely opposite sides of the plane of said plate, one of saidoffset-portions pro viding a pair of spaced shoulders and the other ofsaid oi'lset portions providing a key- Way,'and a Wedge in said keywayadapted to kink the tie element by bending it between said shoulders. V

8. A clamp comprising a sheet metal plate, aportion of said plateforming a guideivay for a tie element, pair of oll'set portionsextending transversely of each other, one 01 said offset portionsproviding a keyvva the other of said offset portions providing aguideway for a tie element, a shoulder on said other offset portion, anda wedge in keyway adapted to kinlrthe tie element by bending it againstsaid shoulder. v

9. A clamp comprising a supporting plate having a portion'struclr outtherefrom to provide a recess and an overlying bridge portion, saidplate andbridge portion defining a guideivay for a tie element, andanother portion struck out from said plate to define a keyway disposedtransversely of said gnideway, said guidewav and keywav being locatedonrespectively opposite sides of the plane of said plate. 7

Signed at Chicago this 9th day of April, 1928.

HENRY H. LAMPERT.

